com.contrastsecurity.cassandra.migration.logging.javautil.JavaUtilLog Maven / Gradle / Ivy

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/**
 * Copyright 2010-2015 Axel Fontaine
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 

 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.contrastsecurity.cassandra.migration.logging.javautil;

import com.contrastsecurity.cassandra.migration.logging.Log;

import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

/**
 * Wrapper for a java.util.Logger.
 */
public class JavaUtilLog implements Log {
    /**
     * Java Util Logger.
     */
    private final Logger logger;

    /**
     * Creates a new wrapper around this logger.
     *
     * @param logger The original java.util Logger.
     */
    public JavaUtilLog(Logger logger) {
        this.logger = logger;
    }

    public void debug(String message) {
        log(Level.FINE, message, null);
    }

    public void info(String message) {
        log(Level.INFO, message, null);
    }

    public void warn(String message) {
        log(Level.WARNING, message, null);
    }

    public void error(String message) {
        log(Level.SEVERE, message, null);
    }

    public void error(String message, Exception e) {
        log(Level.SEVERE, message, e);
    }

    /**
     * Log the message at the specified level with the specified exception if any.
     *
     * @param level   The level to log at.
     * @param message The message to log.
     * @param e       The exception, if any.
     */
    private void log(Level level, String message, Exception e) {
        // millis and thread are filled by the constructor
        LogRecord record = new LogRecord(level, message);
        record.setLoggerName(logger.getName());
        record.setThrown(e);
        record.setSourceClassName(logger.getName());
        record.setSourceMethodName(getMethodName());
        logger.log(record);
    }

    /**
     * Computes the source method name for the log output.
     */
    private String getMethodName() {
        StackTraceElement[] steArray = new Throwable().getStackTrace();

        for (StackTraceElement stackTraceElement : steArray) {
            if (logger.getName().equals(stackTraceElement.getClassName())) {
                return stackTraceElement.getMethodName();
            }
        }

        return null;
    }
}